I have an Assets field on my site. When I click to upload files, the assets box opens as it should, but displays my homepage. Any ideas?
Update: based on your comment that you've got a multiple sites installed on the same server:
Make sure the correct system dir is being specified in your
admin.php files, and that you've got valid values for
An over-ambitious .htaccess re-write rule is commandeering the
?ACT= request, and redirecting the URL to the homepage, perhaps?
Should be easy to test; comment out and/or remove the .htaccess rules, if possible, and see what happens.